I doubt that a court or regulator would see that as a revocation of consent when the consent was explicitly given by the user. DNT is a global so its continuing

I doubt that a court or regulator would see that as a revocation of consent when the consent was explicitly given by the user. DNT is a global so its continuing to be sent to the site doesn't really provide any evidence that the user means to revoke the consent that they just gave. All it really indicates is that the user doesn't want to turn off DNT globally.